Plywood Roof Sheathing Spacing

Virtually every one recommends that you your carpenter or builder create a 1 8 inch gap around all edges when installing plywood.

Plywood roof sheathing spacing.

Support spacing when the panel is used for subflooring. Or for floor sheathing over supports spaced up to 16 inches o c. For improved performance consider thicker roof sheathing panels panel edge clips or panels with tongue and groove edges. Check the nailing surface is level step 2.

If your roof carries a heavier load like if there s less pitch and or it snows in your area a roofer may recommend the use of the inch variety. The minimum plywood for roofing plywood is layers of wood. Panel selection handling and storage table 2. If the wood structural panels are tightly butted there is no room for expansion and buckling can occur.

In severe cases the sheets of plywood can actually create humps and dips between the roof framing members. The thickness of plywood used for roof decking depends on the roof slope the spacing of. Many factors affect thickness. And scroll down to see more details on each with installation hints and tips below.

This is a popular option because it presents homeowners with functional but affordable roof sheathing. Cover sheathing with. Plywood is made with three or more layers of thin wood glued together with the grain. The second number is the maximum o c.

Plywood and oriented strand board osb like all wood products will expand or shrink slightly with changes in moisture content. Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets. Plywood clips also referred to as h clips or panel edge clips are small metal brackets placed between the unsupported edges of plywood sheathing to effectively reduce the support spacing and stiffen the plywood. Properly fasten panels including fastening and spacing hints step 4.

A structure s roof truss spacing can vary from every 12 to 24 inches. Check building code requirements for installation of panel edge clips. A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c. A 1 8 inch space between adjacent panel end and edge joints is recommended unless panel manufacturer indicates otherwise.

A half inch cdx plywood is often used with rafter with 24 inch spacing. Spacing in inches for roof sheathing. The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing. Apa recommends a 1 8 inch space between panel edge and end joints.